Usage Type

Annual - Every Year (6011)
Biannual - 2 Times Per Year (103)
Biennial - Every 2 Years (27)
Biennial even (767)
Biennial odd (870)
Quadannual - 4 Times Per Year (24)
Quadrennial - Every 4 Years (1)
Triannual - 3 Times Per Year (22)
Triennial - Every 3 Years (48)
Unlimited (19)